> Markdown version of [/videos/1424-friend-or-foe-typescript-security-fallacies?t=139](https://www.wearedevelopers.com/videos/1424-friend-or-foe-typescript-security-fallacies?t=139). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Friend or Foe? TypeScript Security Fallacies

Are your TypeScript interfaces leaving your Node.js backend exposed? Discover how attackers bypass static compile-time checks and learn to implement strict runtime validation.

- **Speakers:** [Liran Tal](https://www.wearedevelopers.com/@liran-tal)
- **Event:** World Congress 2025
- **Published:** August 20, 2025
- **Duration:** 27:41
- **URL:** https://www.wearedevelopers.com/videos/1424-friend-or-foe-typescript-security-fallacies
- **Thumbnail URL:** https://customer-goifxnzhrq3d0d54.cloudflarestream.com/a3291535d47cbfce8aee488b1709eec1/thumbnails/thumbnail.jpg?time=11625ms

## Access

Playback and chapters for this video are available with a Free account.

## Related Moments

- [Introduction to the speakers and the TypeScript problem](https://www.wearedevelopers.com/videos/81-the-art-and-craft-of-type-development) (from "The Art and Craft of Type Development")
  - **Thumbnail URL:** https://customer-goifxnzhrq3d0d54.cloudflarestream.com/ccc72f366fd3b55db89270617df67a11/thumbnails/thumbnail.jpg?time=30000ms
- [The origins and early problems solved by TypeScript](https://www.wearedevelopers.com/videos/100061-typescript-features-that-changed-the-game) (from "TypeScript Features That Changed the Game")
  - **Thumbnail URL:** https://customer-goifxnzhrq3d0d54.cloudflarestream.com/3fc78ac635b1925434ff3297587532a7/thumbnails/thumbnail.jpg?time=125600ms
- [Exploring the benefits of type safety and TypeScript migration](https://www.wearedevelopers.com/videos/1302-wearedevelopers-live-dishonest-charts-britcss-debugging-with-ai) (from "WeAreDevelopers LIVE - Dishonest Charts, BritCSS, Debugging with AI")
  - **Thumbnail URL:** https://customer-goifxnzhrq3d0d54.cloudflarestream.com/68c5fb24e01a2f47181b581308ccc0a4/thumbnails/thumbnail.jpg?time=250960ms
- [Misconceptions about TypeScript safety capabilities](https://www.wearedevelopers.com/videos/327-do-typescript-without-typescript) (from "Do TypeScript without TypeScript")
  - **Thumbnail URL:** https://customer-goifxnzhrq3d0d54.cloudflarestream.com/5101eb365bde99fd823a510d36946dc2/thumbnails/thumbnail.jpg?time=26485ms
- [Introduction to hidden problems in typical TypeScript code](https://www.wearedevelopers.com/videos/610-lies-we-tell-ourselves-as-developers) (from "Lies we Tell Ourselves As Developers")
  - **Thumbnail URL:** https://customer-goifxnzhrq3d0d54.cloudflarestream.com/777170d595d429270451f01bd411a596/thumbnails/thumbnail.jpg?time=19665ms
- [Discovering the hidden drawbacks of advanced type mitigations](https://www.wearedevelopers.com/videos/610-lies-we-tell-ourselves-as-developers) (from "Lies we Tell Ourselves As Developers")
  - **Thumbnail URL:** https://customer-goifxnzhrq3d0d54.cloudflarestream.com/777170d595d429270451f01bd411a596/thumbnails/thumbnail.jpg?time=19665ms

## Related Articles

- [Walking Into The Era of Supply Chain Risks](https://www.wearedevelopers.com/magazine/106-walking-into-the-era-of-supply-chain-risks)
- [Exploring TypeScript: Benefits for Large-Scale JavaScript Projects](https://www.wearedevelopers.com/magazine/554-exploring-typescript-benefits-for-large-scale-javascript-projects)
- [Dev Digest 138 - Are you secure about this?](https://www.wearedevelopers.com/magazine/486-dev-digest-138-are-you-secure-about-this)
- [Dev Digest 136 - No JS(on) of mine](https://www.wearedevelopers.com/magazine/482-dev-digest-136-no-js-on-of-mine)

## Related Jobs

- [Staff Developer Advocate, GitHub Security Lab](https://www.wearedevelopers.com/jobs/ext/3929243-staff-developer-advocate-github-security-lab) at **GitHub**
- [Senior Software Engineer, Vulnerability Management](https://www.wearedevelopers.com/jobs/ext/3814641-senior-software-engineer-vulnerability-management) at **GitHub**
- [Senior Web Software Architect, AI Experiences](https://www.wearedevelopers.com/jobs/ext/4523834-senior-web-software-architect-ai-experiences) at **TeamViewer Germany GmbH**
- [Senior Software Engineer (Backend/Full Stack)](https://www.wearedevelopers.com/jobs/ext/4491361-senior-software-engineer-backend-full-stack) at **AMD**
- [Staff Security Data Engineer](https://www.wearedevelopers.com/jobs/ext/4469379-staff-security-data-engineer) at **GitHub**
- [SoC Offensive Security Staff Engineer](https://www.wearedevelopers.com/jobs/48479-soc-offensive-security-staff-engineer) at **Arm**